The use of GANs as a potential general purpose solution to image-to-image translation problems was first highlighted by Isola et al. [1]}. In their framework, named pix2pix, GANs were conditioned on input images in order to produce desired output images in a paired image setting. As such, the output produced by the GAN is evaluated both by the discriminator and by using an \(L_{1}\)  loss relative to the target.
